Korea Flora: Evergreen tree or shrub to 25m tall, trunk to 1m diam. root system spreads irregularly, and bark grayish-brown, larger branches reddish-brown. leaves green and vertically spread. scale-shaped leaves pointed, with those in the center lanceolate and on the sides ovate. leaves broad petioles with small white spots. male cone at the end of last year's shoot, 2-2.5mm long with 10 scales, each with 2-4 seeds. male cone stalk short. seed cones subglobose, 2mm width, 15-20mm long with a light pebble-like color and eight scales, and 2-3 seeds per scales. Seeds grayish brown, ellipsoid and slightly ridged.

Pollination April
Seed maturity September.

Distribution; native to northern China, but widely planted. Distributed in Dalseong, Daegu, Yeongcheon-ri in Danyang-gun, Chungcheongbuk-do, Guri in Andong, Gyeongsangbuk-do, and Seongryugul in Uljin-gun, Gyeongsangnam-do.

Taxonomic note: It is classified as a separate genus because of 6-8 seed scales (Thuja koraiense 8-10 scales) and only partially covers the seeds, with almost no wings on the seeds.

Japan Flora: Evergreen shrub to small tree often branched nearly to base; branchlets slender, vertically flat­tened, 1.5-2 mm. wide; leaves deep green, deltoid-ovate, small, with a sessile gland on back, subacute on the branches, acute on main axis; cones ovoid, 15-25 mm. long, the scales fleshy, ovate, obtuse, with a recurved mucro on back below apex; seeds 2 on each scale, ellipsoidal, wingless. 

Frequently culti­vated in Japan.    Korea and China